Lock.



Patented July 9, leoL T. RICHARDS.

LUCK.

(Application fil ed Mar. 9, 1901.)

(No Mqdel.)

WITNESSES:

E ZVENTOHI Mam Arm/mt? THE norms versus no, FNOTO-LIYKQ, WASHINTOIL 0.1;.

UNITED STATES PATENT OFFICE.

THOMAS RICHARDS, OF CHICAGO, ILLINOIS, ASSIGNOR OF NINE-TWENTIETHS TO DAVID RICHARDS, OF SAME PLACE.

LOCK.

SPECIFICATION forming part of Letters Patent no. 678,305, dated July 9, 1901.

Application filed-March 9,1901. Serial No- 50,424. (No model.)

To ail whom it may concern.-

Be it known that I, THOMAS RICHARDS, a

citizen of the United States of America, and a resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Locks, of which the following is a specification.

My invention relates particularly to sashlocks which work automatically.

The main object of my invention is to provide an improved automatic lock which is positive in its action and which can be cheaply produced,owing toits simplicity in structure. I attain this object by the device illustrated in the accompanying drawings, in which-=- Figure 1 is avertical section of said device on the line 1 lot Fig. 2. Fig. 2 is a front elevation, partly broken away to show the means for retaining the key. I Fig. 3 is a plan view .of the escutcheon. Fig. 4 is aperspective view of the key. Fig. 5 is a perspective view of the dog. Fig. 6 is an elevation of the stop for attachment to the window-frame.

In the device shown, 1 represents the window-sash, and 2 the jamb or abutting frame.

3 is the lock-casing, preferably made in one piece, having ajdeep pocket 6, from which the back Wall 5 slants forward. The dog 1 has its lower end 11 rounded to bear at the bottom of the pocket 6 and its upper end adapted to engage the shoulder 9 of the stop 7. The sloping Wall 5 holds the dog forward,

so that it will fall through the opening 14 intothe recess 8 when opposite said recess,thus automatically locking the window. This movement of the dog may also be assisted by a spring 12, if desired, the spring being placed in a groove 13, so as not to interfere with the bearing of the dog in the pocket 6. The dog is removed from engagement with the stop 7 by a key having a square shank 15, which fits a hole 10 in the lower part of said dog, and having a lug 16, which moves in a recess 17 in the sash and prevents the removal of the key by bearing against the escutcheon 18. The escutcheon has a circular hole 19, large enough to admit the square shank of the key, and the recess 20, which will allow the passage of the lug, the escutcheon being so turned when screwed to the sash that the lug and its corresponding recess cannot come in opposition. The stop 7 is preferably made in the form shown in Fig. 6, having a cylindrical part 21 and a lip 22, this being adapted to be readily set into the wood.

It will be seen that the shape of the stop 7 permits the seat in the window-frame for its cylindrical part 21 to be readily formed by.

meansof an anger. The point of the auger will .form an aperture for starting the screw which secures said stop to the window-frame. The recess and seat for the lip 22 may be readily chiseled out to meet the seat formed by the auger.

It will be understood that the device shown may be reversed for use on the upper sash. In such case the escutcheon will preferably be set in flush with the sash and may be depressed for the head of the key, or the head of said key may be made smaller or of diiferent shape, so as to avoid contact with the meeting-rail on the lower sash. The spring 12 has its lower end bent inwardly and seated in an aperture at 23 in the lower front part of the dog 4.

The operation of my device is as follows: When the lower sash 1 is down in the closed position, the dog 4: will normally rest in the position shown by the dotted lines in Fig. 1, with'its upper end in engagement with.the shoulder 9 on the stop 7. To raise the sash, the operator will turn the key 15 slightly toward the right, so as to release the upper end of the dog from the shoulder 9, and thus bring the dog into the position shown by the full lines in Fig. 1. The sash may then be raised and the key may be released by the operator. The upper end of the dog will then be held inwardly through contact with the abutting surface of the frame 2. When the sash is again lowered to .its closed position, the dog will again fall toward the left into engagement with the stop 7, and thus automatically lock the sash in said closed position. It will be seen that the spring 12 may, if desired, be omitted'from the lock when applied to the lower sash, since the weight of the upper end of the dog would normally bring same into the locking position. When the device is reversed for use on the upper sash, the spring 12 will be necessary to hold said dog normally in the locked position.

It will be understood that some of the details of the construction shown may be a1- tered without departing from the spirit of my invention. I therefore do not confine myself to such details, except as hereinafter limited in the claims.

What I claim as my invention, and desire to secure by Letters Patent, is

1. In a lock, the combination of a casing, open at the front, having its bottom and rear wall each slanting forward and upward and joined in a curve to form a pocket at the lower rear part of the casing, a dog fitting in said casing, having its lower end of opposite contour to said pocket and resting loosely therein, and a key whereby said dog may be operated from the outside of the casing.

2. The combination of a window-frame; a sash vertically slidable therein; a lock let into the side of the sash, open toward the lower part of said dog, and adapted to turn said dog back into said casing; a lug on the shank of said key; and an escntcheon adapted to engage said lug and prevent the loss or removal of said key.

Signed at Chicago this 6th day of March, 1901.

THOMAS RICHARDS.

Witnesses:

WM. R. RUMMLER, EUGENE A. RUMMLER. 

